在非平衡超音速流中对和氧三体重组的总方程研究
Aakanksha Notey1, Sung Min Jo2, Marco Panesi1,3
1Center for Hypersonics and Entry Systems Studies (CHESS), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
The Journal of chemical physics
|November 21, 2025
概括
本研究研究了在突然冷却下N2+N和O2+O系统中的能量转移和重组. 国家对国家的分析揭示了对非平衡动态和重组率的洞察力.
科学领域:
- 化学动力学 化学动力学
- 非平衡的热力学.
- 分子动力学分子动力学
背景情况:
- 了解能量转移和重组对于建模高温气体动态至关重要.
- 反应堆的突然冷却会导致强烈的不平衡条件,影响化学过程.
- 国家对国家 (StS) 研究对于准确的减少顺序模型至关重要.
研究的目的:
- 在突然冷却下,研究N2+N和O2+O系统中的能量转移和再组合.
- 对非平衡现象进行状态对状态 (StS) 分析.
- 为再组合过程开发准确的配合策略.
主要方法:
- 在10,000 K的0-D同热反应堆中模拟突然冷却.
- 解决总方程以确定能量水平的人口分布.
- 计算准稳定状态 (QSS) 时期的有效重组速率常数.
主要成果:
- 对于N2+N,旋转模式的平衡速度比振动更快,但对于O2+O,平衡速度不太强.
- 由于不和性,冷却时间常数低于加热时间常数.
- 有效重组速率常数是使用StS群体分布计算的.
结论:
- 在N2+N和O2+O系统之间,非平衡重组动态不同.
- StS分析为减少顺序建模和捆绑策略提供了关键数据.
- 无和性显著影响冷却流中的放松时间常数.
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